Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Progress in Retiring Silver Certificates," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "June 1918," Federal Reserve Bulletin (June 1918) : 14-16. https://fraser.stlouisfed.org/title/62/item/21107/toc/391577 , accessed on April 23, 2024.